Method of rubberizing fabric



AAAAS@ F. C. HALL.

METHOD OF RUBBERIZING FABRIC Feb. 6, 1923.

Filed Oct.

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STATES .FREDERICK C. HALL, OF PAWTUCKET, RHGDE ISLAND,'ASSEG1\TOR TO JENCKES SPXNNING COMPANY, F PAW'IUCKET, RHODE SLAND, A CORFORATON 0F RHODE 'SLND.

IJIETHOD 0F RUBBERZING Application led October '7, 1921. Serial No. 506,097.

To all whom t may concern: is not the tension which is best suited to the Be it known that l, FREDERICK C. HALL, efficient and economical production of ruba citizen of the United States, residing at berized cord fabric. l have found that the Pawtucket, in the county of Providence and process may be greatly improved and the State of Rhode lsland,'have invented'cer- Waste of fabric vduring the process reduced 5e tain new and useful lmprovements in Methor eliminated by so distributing the tension ods of Rubberizing Fabric; and l do herebyl or pull on the cords leading to the calender declare the following to be a full, clear, and rolls that the cords in the center portion of exact description of the invention such as the fabric are tighter or undei greater tenwill enable .others skilled in the art to which sion than the cords in the edge portions. 65 it appertains to make. and use the same. have also found that the best results are The invention relates to the manufacture secured if there is a slight progressive inof rubberized cord fabric such as is used in crease in the tension on the cords from4 each the manufacture of cordtires. edge toward the center. The tension on the Uord tire fabric, before it is rubberized, cords leading to the calender rolls may be 70 consists of a web of comparatively heavy thus distributed and maintained during the warp threads or cords bound together by rubberizing of the fabric with the usual convery ne and weak filling threads which struction of tire calender., provided the fabare widely separated and serve merely to ric wound'on the supply roll is woven with retain the cords in close parallel relation. a tight center due to a slight progressive 75 ln rubberizing this fabric preparatory to increase in the tension of the cords from incorporating -it in tires it is subjected to each edge toward the center, as fully dethe action of heavy calender rolls to which scribedl in my application No. 453,509., filed it is fed under 'heavy tension. Uwing to the March 18, 1921. l prefer, therefore, to utiweakness and wide spacing of the fine filling lize this fabric in controlling the tension on 80 threads the action of the rolls will cause the cords leading to the calender roll. l'l'hen any comparatively loose cords or series of a fabric of this character is led from the cords to creep along the fabric and bank supply roll to the rubberizing calender rolls up at the point where the fabric enters the under a slight tension the center of the rolls until sufficient slack accumulates to fabric will becometaut, while there will be 85 form a fold which will enter the rolls and `a slight and gradual droop or ruffling toward cause a rupture of the fabric at this point. the edges of the fabric due to the fact that Comparatively slack cords or zones of slack the cords in the edge portions are somewhat cords in the fabric are therefore highly oblonger than the cords in the center portion jectionable. l/Vhile slackness or under tenof the fabric. Upon an increase in the ten- 90 sion of the cords is objectionable in any sion, however, this will disappear and the part of the fabric leading to the rolls it is fabric will lie fla-t' and taut from side to more serious toward the center than at the side and will run uniformly and smoothly edges, since the center is better adapted to to the rolls. @wing to the tight center and 40 distribute andy withstand the extra strain to the decrease in the tension of the cords toa5 which those parts of the fabric in which the ward each edge the strain on the fabric due tension of the cords is up to standard are to the tension under which it is fed to the necessarily subjected in case of-slackness in rolls is so distributed across the fabric that other parts of the fabric. the greater strain comes on the stronger cenlt has accordinglybeen the aim of tire ter while the least strain comes on the weaker le@ manufacturers to maintain an equal and subedges.. The fabric may, therefore, not only stantially uniform tension on all of the cords be maintained in a smooth flat condition leading` tothe calender rolls and to secure with less tension than heretofore but the this condition the manufacturers of cord tire danger of breaking the cords at the edges fabric have striven with varying degrees and thus causing the fabric to tear across 1s 105 of success to weave a fabric in which the practically eliminated. cords shall be under the same uniform ten- The method is illustrated in the drawings sion throughout the width of the fabric. l in which Fig. l is a diagrammatic view of have discovered, however, that the equal a rubberizing calender, F ig. 2 is adiagramtension on the cords heretofore striven for 'matic view of the fabric of application No. 11o

453,509, and Figs. 3 and 4 are diagrammatic lengthwise sections through the edge and through the center portion of the fabric.

As indicated diagramniatically in Figs. 2, 3 and 4 of the drawings the cords in the edge portions of the tight center fabric 2 are greater in lengths than the cords in the center portion, the lengths of the cords gradually decreasing from the edges toward the center. This fabric may be led from the supply roll spindle 4 to the roll 6 of the calender which appliesv the rubber compound thereto in the usual manner as indicated in Fig. l. The tension on the cords may be regulated by adjusting the usual friction brakes which resist the rotation of the suply roll. Owing to the manner in which the tight center fabric was Woven, that is, with a progressive increase in the tension on the cords from the edges toward thecenter the frictiona-l resistance to the rotation of the supply roll will maintain a like tension on the cords as they lead from the supply roll to the calendar rolls during the rubberizing -of the fabric with the advantageous results l already explained.

What is claimed is: 1. The process of rubberizing cord tire fabric which consists in leading a Web of closely arranged parallel cords through rubberizing calender rolls while maintaining a tension on the cords which progressively increases from the edges of the Web' toward the center.

2. The process of rubberizing cord tire fabric which' consistsin leading a web vof closely. arranged parallel cords through rubberizing calender rolls While maintaining the cords in the center` portion of the Web under greater tension than the cords in the edge portions.

3. The process of rubberizing cord tire fabric which consists in leading through rubberizing calender rolls a cord fabric having cords of greater length in the edge portions than in the renter portion and maintain-- FREDERICK C. HALL. 

